Remove unused import
Remove unused import

This patch is removing the "import *" from
ironic/tests/unit/db/__init__.py because it was not used.

Change-Id: I754447d63e0e1162ae6cd0506158e95bf0ba7cdd

pshchelo/ironic,SauloAislan/ironic,pshchelo/ironic,NaohiroTamura/ironic,openstack/ironic,openstack/ironic,NaohiroTamura/ironic,SauloAislan/ironic